I went more than 30 years without using a generator, or solar, but that was primarily for shorter camping trips, long weekends mostly with occasional week to 10 days. If you're only going to be camping a few days in one spot, you can just go with a beefed up battery bank and a little conservation unless you need the microwave, air conditioning etc.
If you don't have a generator already, my recommendation would be to start with one of those, then supplement with solar if and when you can. Generators offer a lot of flexibility, work virtually everywhere, and can provide a lot of power if you get the right one. They are however in my opinion, often a pain in the backside.
For ac use, you'll almost certainly need a generator of 3000 watts or more to work reliably, especially at altitude and when anything else in the trailer might be drawing power. I recommend an inverter unit as they tend to be much quieter, and less annoying to your neighbors.
Welcome to the madness
